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Thread: Logarithmic equation

  1. #1 Logarithmic equation 
    Forum Freshman IAlexN's Avatar
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    I'm not sure how if I have made mistakes. Nevertheless, I don't know how I should continue.

    Any help appreciated.

    Thanks


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  3. #2 Re: Logarithmic equation 
    . DrRocket's Avatar
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    Quote Originally Posted by IAlexN














    I'm not sure how if I have made mistakes. Nevertheless, I don't know how I should continue.

    Any help appreciated.

    Thanks










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  4. #3  
    Forum Ph.D. Heinsbergrelatz's Avatar
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    That minus sign on your last step is a trouble maker, as that will get you nowhere really.

    from your 4th step its straight forward from there.




    and you solve it like a quadratic equation:

    so basically:



    y= is either 2,1

    thus x= 100, or 10 and log(x)= 2, or 1
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    "Mathematicians stand on each other's shoulders."- Carl Friedrich Gauss


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  5. #4  
    Forum Freshman IAlexN's Avatar
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    Quote Originally Posted by Heinsbergrelatz
    That minus sign on your last step is a trouble maker, as that will get you nowhere really.

    from your 4th step its straight forward from there.




    and you solve it like a quadratic equation:

    so basically:



    y= is either 2,1

    thus x= 100, or 10 and log(x)= 2, or 1
    Thanks to both for the quick replies.
    When one person suffers from a delusion, it is called insanity. When many people suffer from a delusion it is called a Religion.

    Robert M. Pirsig
    Reply With Quote  
     

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